O quam pulchra es casta

Source: 
Arras, Bibliothèque municipale, 893 (olim 465)
Folio: 
338r
Sequence: 
2
Feast: 
Purificatio Mariae
Office/Mass: 
M
Genre: 
A
Position: 
2.1
Cantus ID: 
004069
Mode: 
7
Differentia: 
2
Differentia database: 
1--l-l-lm-l-k-jk--4 144c